Lock



March 13, 1934. w MAHQN 1,950,503

LOCK I Filed April 14, 1930 5 Sheets-Sheet 1 March 13, 1934. H. w. MAHON LOCK Filed April 14, 1930 3 Sheets-Sheet 3 f ngmll III/[Ill //7 1/67? for Ham/J W fl/dfi 0 7 4// f/76 y MM Patented Mar. 13, 1934 UNITED STATES PATENT OFFICE LOCK Application April 14, 1930, Serial No. 444,169

'3 Claims.

My invention is primarily intended for use upon closures, that are desired to be locked. The lock may be used in combination with an electric circuit. The lock has selective means for unlatching the bolt when once locked. The unlatching is accomplished through the manipulation of the selective means which have recesses disposed therein into which the unlocking latch may be made to enter when the selective means have been placed in registerable alignment with each other and with the locking latch.

The invention primarily consists of two housings in which the locking elements are disposed. The secondary housing is disposed upon the primary housing and when the hinged closure of the secondary housing is opened the locking elements are made available for use.

The primary object of my invention is to pro vide a safety lock that is primarily adapted for use upon automotive vehicle closures having for its object the maintaining of the closures in locked position until the same has been opened through the use of selective locking means.

A further object of my invention consists in providing suitable mechanism through the selective placement of which the unlocking of a locking bolt, which is normally maintained in locked position by a locking latch associated therewith, is accomplished when the combination is known.

A still further object of my invention consists in providing associated elements for normally maintaining a bolt in locked position and which may be unlocked by the manipulation of tumblers that are selectively placed through hand manipulation of graduated dials.

My invention may be used with equal facility upon the closures of homes, office buildings, chain stores, vehicles of all kinds and any and all places where it is desired to use precaution in preventing the untimely unlocking of the closure by any and all persons unfamiliar with the operation of the device.

With these and incidental objects in view, the .invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims, and a preferred form of embcdiment of which is hereinafter shown with reference to the drawings which accompany and form a part of this specification.

In the drawings:

Fig. l is a perspective, side view of the locking device shown in normal, unlocked position.

Fig. 2 is a perspective, side view of the mechanism illustrated in Fig. 1 and illustrating the closure of the secondary housing in opened position.

Fig. 3 is a sectional, side view of the assembled device illustrating the same in unlocked position.

Fig. 4 is a sectional, top view of the mechanism illustrated in Fig. 3, the same being taken on line 44 of Fig. 3 looking in the direction indicated.

Fig. 5 is a sectional view taken on line 5--5 of Fig. 3 looking in the direction indicated.

Fig. 6 is a sectional, end view taken on line 6-6 of Fig. 3 looking in the direction indicated.

Fig. 7 is a fragmentary, sectional, end view of the primary hand manipulative shaft and illustrating the selective means disposed thereupon.

Fig. 8 is a fragmentary, sectional, side view of the housing member, the shaft extending therethrough upon which the selective tumbler wheels are disposed and also illustrating the graduated hand manipulative discs disposed upon the shaft and through the operation of which the tumbler discs are placed in desired position, the same being taken on line 8-8 of Fig. 7 looking in the direction indicated. a

Fig. 9 is a fragmentary, sectional view of the mechanism illustrated in Fig. 7, the same being taken on line 9-9 of Fig. 7 looking in the direction indicated.

Fig. 10 is a fragmentary, sectional, side view of the locking latch shown as being engaged within one or more of the tumbler wheels.

Fig. 11 is a fragmentary, sectional, side view of the trigger switch, illustrating the same in normal inactive position and illustrating the same in position to maintain the electric circuit as an open circuit.

Like reference characters refer to like parts throughout the several views.

I form my device of a primary metal housing 1 having a removable side wall 2 secured thereto. A secondary housing 8 is secured to the remov able side wall 2. A closure 4 is hingedly secured to the secondary housing 3. A key operated lock 5 is disposed within the closure 4. The bolt 6 of the key operated lock is adapted to engage within a bolt receiving slot 7. When the bolt is actuated and the hinged closure 4 is normally closed the bolt receiving slot is received within a projection 8 that extends outwardly from the side wall member 2. The assembled device is placeable within the closure with the secondary housing 3 and the hinged closure 4 extending outwardly from the side wall of a door or any other suitable closure to be locked thereby.

A locking bolt 10 is slidably disposed within the primary housing. A reacting element 11, as a coil spring, is secured upon its one end to the bolt, by any suitable means, as by a stud 12, and upon its oppositely disposed end to a receiving hook 13. A stop lug 14, extends downwardly from the bottom wall of the locking bolt, and a locking latch 15 is disposed in registerable alignment with the stop lug 14. When the bolt is placed into locked position, the locking latch engages under the stop lug and thereby maintains the bolt in locked position. The locking latch is hingedly supported upon a journal pin 16. A reacting element, as a spring 17, normally maintains the locking latch in contact with the under side of the bolt and in placement for engaging the stop lug 14 when the bolt is placed in looking position. A rod 18 extends outwardly from the locking bolt and terminates ina knob 19. A slot 20 is disposed in the side wall of housing 1 through which the rod 18 extends. Manual manipulation of the rod 18 places the locking bolt 10 in locked position. A yoke 21 extends downwardly from the locking latch and passes about the trip lever 22. The trip lever 22 is hingedly supported about a journal pin 23 disposed within the primary housing 1. The trip lever 22 has a gear segment 24 disposed upon its oscillating end and a pinion 25 ooacts with the gear segment. The pinion 25 is mounted upon a shaft 26 journaled within the primary housing. The shaft 26 has a wing nut 27 disposed upon its outer end that adapts the same to manual manipulation. The wing nut is disposed within the secondary housing and is easily accessible to the operator of the device. A reacting element 28 is supported upon its one end by a bracket 29 disposed upon the inside of the primary housing, the reacting element being secured to the bracket by any suitable fastening means as by a rivet 30. The free end of the reacting element engages in a foot 31 that is formed upon one end of the gear segment 24. A latch 32 is reciprocably disposed within guideways 33 and 34 and the same rests upon the lever 22 that passes therethrough. The lower end 35 of the latch 32 normally rests in spaced relationship with the peripheral rim of the tumbler wheels 36, 3'7, and 38, and when the locking bolt is placed in locked position the space is increased by the latch being permitted to drop into the recess '76 disposed in the trigger 62. A shaft 39 is journaled within the side walls of the primary housing and the tumbler wheel 36 is adjustably positioned upon the shaft 39. A graduated disc 40 terminates the shaft 39 upon its one end. A sleeve shaft 41 is rotatably disposed about the shaft 39. The tumbler wheel 37 is adjustably positioned upon the shaft 41. A graduated disc 42 is secured to the shaft 41. The hollow shaft 43 is rotatably disposed about the shaft 41 and the tumbler wheel 38 is adjustably positioned about the hollow shaft 43. The graduated disc 44 is secured upon one end of the hollow shaft 43. Each of the graduated discs 49, 42 and 44 are closely associated but in spaced relationship with each other. The graduations disposed upon each of the discs indicates the relative position of each of the tumbler wheels that are secured to the respective shafts to which the graduated discs are secured. Each of the tumbler wheels have teeth disposed upon 1 their outer periphery and one tooth section of each of the wheels is a movable section and is secured to a reacting element as a spring 45. The spring 45 is secured upon its one end to a bracket 46 by any suitable means as by a screw 4'7. The oppositely disposed end of the spring 45 is secured to the movable toothed member 48 disposed within each of the tumbler wheels. The movable section 48 may be made as illustrated in Fig. 9 wherein the cross sectional area of the tumbler is illustrated at 49 and wherein channel ways 50 and 51 are formed within the section 48 to form guideways to permit the up and down movement that is to be imparted to the movable section. Ihe spring 45 is secured to lug 52 by any suitable fastening means, as by a rivet 53. A stop 54 is interposed in the line of travel of the spring against which the spring comes to rest to accurately position the movable section 48 in the peripheral edge of the tumbler in which the same is placed. The graduations representing the combination disposed upon the outer graduated disc indicates the position of the movable sections disposed within the tumbler wheels. Screws '7'7v are disposed in the spring hub of each of the tumbler wheels to facilitate adjustment of the wheels upon their respective shafts in order to permit a change in the combinations when desired.

I have here shown my combination graduated discs and the tumbler wheels as being three in number but I do not wish to be limited to any specific number of wheels or discs as the same principle may be used with equal facility using different numbers of each. When the tumbler wheels have been so placed that the movable section of the wheel is in registerable alignment with the latch 32, the latch may then be depressed through the hand manipulation of the wing nut 2'7 which rotates the pinion 25 and lowers the trip lever 22. The lowering of the trip lever 22 engages the yoke 21 and disengages the locking latch 15 from the stop lug 14 at which time the spring 11 returns the locking bolt to its normal unlocked position. The releasing of the wing nut 2'7 permits the spring '28 to return the trip lever 22 to its normal raised position and thereby raises the latch 32 out of registerable engagement with the tumbler wheels.

Electric terminals 55 and 56 extend outwardly from the side walls of the primary housing to which electric conductors may be attached. Electric contact points 57 and 58 are disposed upon the inner ends of the electric terminals 55 and 56 and a gap 59 is normally maintained between the two electric contact points. The gap is maintained by a pin 60 disposed upon one side of the spring conductor 61 that has one end secured to the terminal 55. The free end of the pin 60 rests upon the trigger 62. The pin 60 slides within the slot 63 disposed within the locking bolt 10. The trigger 62 is pivotally disposed within a recess 64 also disposed Within the locking bolt 10 and is pivotally mounted about a journal pin 65. The under side of the trigger normally rests upon the latch 32 and is held in intimate contact therewith by a reacting element, as a spring 66 that is secured upon its one end to one of the walls of the locking bolt by any suitable fastening means, as by a screw 6'7. Intimacy of contact is also maintained between the trigger and the latch by the upward exertion of the spring 28. The gap 59 is maintained when the pin 60 engages upon the surface of the trigger 62. When the wing nut 27 is manipulated, the latch 32 is forced downwardly and is made to engage the peripheral rim of the tumbler wheels and the pin 60 slides from the surface 69 of the trigger and drops into the recess 70. When these movements are completed, contact between the terminals is closed and the electric circuit completed, to thereby permit a signal or gong to be actuated, if desired. The circuit will remain closed until the tumbler wheels are placed in registerable alignment with the latch 32 at which time the wing nut may be further turned and the locking bolt returned to its normal position. In doing so, the sloping surface 71 disposed upon the trigger, will engage the pin 60 and recreate the gap between the contact points disposed within the electric circuit.

An electric terminal '72 is disposed within the primary casing and a push rod '73 is disposed upon one side of the terminal '72. The push rod '73 is in registerable alignment with a pad 74 disposed upon the hinged closure 40 and when the hinged closure is shut, a gap is maintained between the electric terminal 72 and the light bulb '75. When the door 4 is opened, the gap disposed between the electric terminal 72 and the electric lamp '75 is closed and the lamp will be illuminated.

While the form of mechanism herein shown and described is admirably adapted to fulfil the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form of embodiment herein shown and described, as it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What I claim is:

1. A device of the class described, comprising a housing, a locking bolt slidably disposed within the housing, spring means secured to the locking bolt and to the housing for normally maintaining the bolt in unlocked position, means disposed within the housing adapted to hold the bolt in locked position after being placed into locked position, spring means disposed underneath the first mentioned means adapted to hold said means in intimate contact with the underside of the locking bolt, a yoke secured to the free end of the first mentioned means, guideways vertically disposed within the housing, a latch slidably disposed within the guideways, a trip lever hingedly disposed within the housing and passing through the latch and the yoke of the first mentioned means, a gear segment disposed at the free end of the trip lever, a pinion rotatably disposed within the housing and in working relationship with the gear segment, spring means disposed within the housing adapted for normally maintaining the trip lever and associated parts in raised position, a plurality of tumbler wheels rotatably disposed within the housing, a movable section disposed within each of the tumbler wheels, means for holding the movable section in direct alignment with the outer periphery of the tumbler wheels, and a disc for each of the tumbler wheels disposed on the outside of the housing.

2. Apparatus as in claim 1 wherein the means for holding the movable sections in direct alignment with the outer periphery of the tumbler wheels include springs secured to the sides of the tumbler wheels and to the movable sections adapted to engage the latch.

3. Apparatus as in claim 1 wherein the means adapted to hold the locking bolt in locked position comprise a locking latch that is hingedly disposed within the housing and directly aligned with the underside of the locking bolt and adapted to engage with the stop lug of the locking bolt.

HAROLD W. MAHON; 

